811
FZUS51 KLWX 170835
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
435 AM EDT WED SEP 17 2025
TIDAL POTOMAC RIVER AND MARYLAND PORTION OF CHESAPEAKE BAY.
FORECASTS OF WAVE HEIGHTS DO NOT INCLUDE EFFECTS OF WIND DIRECTION
RELATIVE TO TIDAL CURRENTS. EXPECT HIGHER WAVES WHEN WINDS ARE
BLOWING AGAINST THE TIDAL FLOW. WAVES FLAT WHERE WATERS ARE ICED OVER.
ANZ500-172300-
435 AM EDT WED SEP 17 2025
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
A COASTAL LOW OFF THE VIRGINIA TIDEWATER WILL DRIFT OFFSHORE
THROUGH TONIGHT. HAZARDOUS MARINE CONDITIONS ARE EXPECTED THROUGH
THIS EVENING. A COLD FRONT WILL MOVE ACROSS THE WATERS FRIDAY NIGHT.
SMALL CRAFT ADVISORIES FOR NORTHERLY CHANNELING ARE POSSIBLE FRIDAY
NIGHT INTO SATURDAY MORNING FOR PARTS OF THE WATERS.
ANZ535-172300-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
435 AM EDT WED SEP 17 2025
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON
REST OF THE OVERNIGHT
N WINDS 15 KT WITH GUSTS TO 25 KT. WAVES
2 FT. SHOWERS LIKELY.
TODAY
N WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 TO 2 FT.
SHOWERS. VSBY 1 TO 3 NM.
TONIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
PATCHY FOG. VSBY 1 TO 3 NM.
THU
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT.
FRI
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI NIGHT
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
E WINDS AROUND 5 KT. WAVES 1 FT.
ANZ536-172300-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
435 AM EDT WED SEP 17 2025
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON
REST OF THE OVERNIGHT
N WINDS 20 KT WITH GUSTS TO 25 KT. WAVES
2 FT. SHOWERS LIKELY. VSBY 1 TO 3 NM.
TODAY...N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
DIMINISHING TO
10 KT IN THE AFTERNOON. WAVES 1 TO 2 FT. SHOWERS. VSBY 1 TO 3 NM.
TONIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
PATCHY FOG. VSBY 1 TO 3 NM.
THU
NW WINDS AROUND 5 KT. WAVES 1 FT.
THU NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT.
FRI
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
E WINDS 5 KT. WAVES LESS THAN 1 FT.
ANZ537-172300-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
435 AM EDT WED SEP 17 2025
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON
REST OF THE OVERNIGHT
NE WINDS 25 KT WITH GUSTS TO 30 KT. WAVES
4 FT. A CHANCE OF SHOWERS. VSBY 1 TO 3 NM.
TODAY...NE WINDS 15 TO 20 KT
DIMINISHING TO 10 KT LATE. GUSTS UP
TO 25 KT. WAVES 2 TO 3 FT. SHOWERS LIKELY. VSBY 1 TO 3 NM.
TONIGHT
NE WINDS 5 TO 10 KT. WAVES 1 TO 2 FT. A CHANCE OF
SHOWERS. VSBY 1 TO 3 NM.
THU
NW WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
E WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ530-172300-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
435 AM EDT WED SEP 17 2025
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
REST OF THE OVERNIGHT
NE WINDS 20 KT WITH GUSTS TO 25 KT. WAVES
2 FT. SHOWERS LIKELY.
TODAY...NE WINDS 15 TO 20 KT
DIMINISHING TO 10 KT LATE. GUSTS UP
TO 25 KT. WAVES 1 TO 2 FT. SHOWERS. VSBY 1 NM OR LESS.
TONIGHT
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT UNTIL EARLY
MORNING. WAVES 1 FT. A CHANCE OF SHOWERS. PATCHY FOG. VSBY 1 TO
3 NM.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
ANZ531-172300-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
435 AM EDT WED SEP 17 2025
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
REST OF THE OVERNIGHT
NE WINDS 25 KT WITH GUSTS TO 30 KT. WAVES
3 FT. SHOWERS LIKELY. VSBY 1 TO 3 NM.
TODAY...NE WINDS 15 TO 20 KT. GUSTS UP TO 30 KT
DIMINISHING TO
20 KT IN THE LATE MORNING AND AFTERNOON. WAVES 2 TO 3 FT. SHOWERS
LIKELY. VSBY 1 TO 3 NM.
TONIGHT
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT UNTIL EARLY
MORNING. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS. PATCHY FOG. VSBY 1 TO
3 NM.
THU
NW WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
SAT...NE WINDS 10 TO 15 KT
BECOMING E 5 TO 10 KT. WAVES 1 TO
2 FT.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ538-172300-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
435 AM EDT WED SEP 17 2025
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
REST OF THE OVERNIGHT
N WINDS 20 KT WITH GUSTS TO 25 KT. WAVES
2 FT. SHOWERS LIKELY. VSBY 1 TO 3 NM.
TODAY
NE WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 TO 2 FT.
SHOWERS. VSBY 1 TO 3 NM.
TONIGHT
N WINDS 5 TO 10 KT. GUSTS UP TO 20 KT UNTIL EARLY
MORNING. WAVES 1 FT. A CHANCE OF SHOWERS. PATCHY FOG. VSBY 1 TO
3 NM.
THU
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
SW WINDS 5 KT. WAVES FLAT.
FRI
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ539-172300-
CHESTER RIVER TO QUEENSTOWN MD-
435 AM EDT WED SEP 17 2025
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
REST OF THE OVERNIGHT
NE WINDS 25 KT WITH GUSTS TO 30 KT. WAVES
3 FT. SHOWERS. VSBY 1 TO 3 NM.
TODAY...NE WINDS 15 TO 20 KT
DIMINISHING TO 10 KT LATE. GUSTS UP
TO 25 KT. WAVES 2 TO 3 FT. SHOWERS LIKELY. VSBY 1 TO 3 NM.
TONIGHT
NE WINDS 5 TO 10 KT. GUSTS UP TO 20 KT UNTIL EARLY
MORNING. WAVES 1 FT. A CHANCE OF SHOWERS. PATCHY FOG. VSBY 1 TO
3 NM.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ532-172300-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
435 AM EDT WED SEP 17 2025
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
REST OF THE OVERNIGHT
NE WINDS 25 KT WITH GUSTS TO 30 KT. WAVES
4 FT. SHOWERS. VSBY 1 TO 3 NM.
TODAY...NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT
DIMINISHING TO
15 KT WITH GUSTS TO 20 KT IN THE AFTERNOON. WAVES 4 FT...SUBSIDING
TO 2 FT IN THE AFTERNOON. SHOWERS. VSBY 1 NM OR LESS.
TONIGHT
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT UNTIL EARLY
MORNING. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS. VSBY 1 NM OR LESS.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
SAT...NE WINDS 10 TO 15 KT
BECOMING E. WAVES 1 TO 2 FT.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ540-172300-
EASTERN BAY-
435 AM EDT WED SEP 17 2025
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
REST OF THE OVERNIGHT
NE WINDS 25 KT WITH GUSTS TO 30 KT. WAVES
3 FT. SHOWERS. VSBY 1 TO 3 NM.
TODAY
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SHOWERS. VSBY 1 TO 3 NM.
TONIGHT
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT UNTIL EARLY
MORNING. WAVES 1 FT. A CHANCE OF SHOWERS. PATCHY FOG. VSBY 1 TO
3 NM.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ533-172300-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
435 AM EDT WED SEP 17 2025
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
REST OF THE OVERNIGHT
NE WINDS 25 KT WITH GUSTS TO 30 KT. WAVES
5 FT...EXCEPT AROUND 3 FT NEAR THE MOUTH OF THE CHOPTANK. SHOWERS
LIKELY. VSBY 1 TO 3 NM.
TODAY...NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT
DIMINISHING TO
10 TO 15 KT WITH GUSTS TO 20 KT IN THE AFTERNOON. WAVES 3 FT.
SHOWERS LIKELY. VSBY 1 TO 3 NM.
TONIGHT
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT UNTIL EARLY
MORNING. WAVES 2 FT. A CHANCE OF SHOWERS. VSBY 1 TO 3 NM.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
SAT...NE WINDS 10 TO 15 KT
BECOMING E. WAVES 1 TO 2 FT.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ541-172300-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
435 AM EDT WED SEP 17 2025
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
REST OF THE OVERNIGHT
NE WINDS 25 KT WITH GUSTS TO 30 KT. WAVES
3 FT. SHOWERS LIKELY. VSBY 1 TO 3 NM.
TODAY...NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT
DIMINISHING TO
10 TO 15 KT WITH GUSTS TO 25 KT IN THE LATE MORNING AND AFTERNOON.
WAVES 2 TO 3 FT. SHOWERS LIKELY. VSBY 1 TO 3 NM.
TONIGHT
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT UNTIL EARLY
MORNING. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS. PATCHY FOG. VSBY 1 TO
3 NM.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 10 TO 15 KT. WAVES 1 FT.
SAT...NE WINDS 10 TO 15 KT
BECOMING E. WAVES 1 FT.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ542-172300-
PATUXENT RIVER TO BROOMES ISLAND MD-
435 AM EDT WED SEP 17 2025
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON
REST OF THE OVERNIGHT
NE WINDS 20 KT WITH GUSTS TO 25 KT. WAVES
1 FT. SHOWERS LIKELY. VSBY 1 TO 3 NM.
TODAY
NE WINDS 10 TO 15 KT. GUSTS UP TO 25 KT UNTIL LATE
AFTERNOON. WAVES 1 FT. SHOWERS LIKELY. VSBY 1 TO 3 NM.
TONIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY. VSBY
1 TO 3 NM.
THU
NW WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ534-172300-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
435 AM EDT WED SEP 17 2025
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON
REST OF THE OVERNIGHT
NE WINDS 25 KT WITH GUSTS TO 30 KT. WAVES
5 FT. A CHANCE OF SHOWERS. VSBY 1 TO 3 NM.
TODAY...NE WINDS 15 TO 20 KT
DIMINISHING TO 10 KT LATE. GUSTS UP
TO 25 KT. WAVES 3 FT. SHOWERS LIKELY. VSBY 1 TO 3 NM.
TONIGHT
NE WINDS 10 KT. GUSTS UP TO 20 KT UNTIL EARLY MORNING.
WAVES 1 TO 2 FT. A CHANCE OF SHOWERS. VSBY 1 TO 3 NM.
THU
NW WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
W WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
W WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT...S WINDS 5 KT
BECOMING NE AFTER MIDNIGHT. WAVES 1 FT.
SAT
E WINDS 10 TO 15 KT. WAVES 2 FT.
SUN
E WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
ANZ543-172300-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
435 AM EDT WED SEP 17 2025
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON
REST OF THE OVERNIGHT
NE WINDS 25 KT WITH GUSTS TO 30 KT. WAVES
3 FT. A CHANCE OF SHOWERS. VSBY 1 TO 3 NM.
TODAY...NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
DIMINISHING TO
10 KT LATE. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS. VSBY 1 TO 3 NM.
TONIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
VSBY 1 TO 3 NM.
THU
NW WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
W WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
W WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT...SW WINDS 5 KT
BECOMING NE AFTER MIDNIGHT. WAVES 1 FT.
SAT
E WINDS 10 TO 15 KT. WAVES 1 FT.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FT.
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